配合牙膏早晚刷牙能有助預防蛀牙，是眾人皆知的事情。570Please respect copyright.ＰＥＮＡＮＡATJ6BQLga2
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但你又知唔知為何牙膏普遍會含有氟化物(Fluroide)? 其用意究竟何在呢？570Please respect copyright.ＰＥＮＡＮＡWaBQjt3pg0
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570Please respect copyright.ＰＥＮＡＮＡDKvbse9GqV
（圖2）牙齒的最外層就係琺瑯質(Enamel)，主要由礦物質hydroxyapatite組成。570Please respect copyright.ＰＥＮＡＮＡzwWPMaTpvU
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570Please respect copyright.ＰＥＮＡＮＡw9ouKSaj6i
口腔內的細菌，會從我們進食的食物中攝取糖份，並消化為乳酸，間接導致口水的pH值下降。570Please respect copyright.ＰＥＮＡＮＡYPb0TpFdbl
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當口水pH值低至5.5以下的時候，琺瑯質裡頭的礦物質便會開始被分解，而口腔細菌就會乘虛而入，造成蛀牙。570Please respect copyright.ＰＥＮＡＮＡLFho1GYc7u
570Please respect copyright.ＰＥＮＡＮＡ1itQMlSxFy
而牙膏的氟化物能有助抑壓這個酸性分解作用，同時當pH回復正常的時候，氟化物亦能幫忙建構所失去的礦物質。570Please respect copyright.ＰＥＮＡＮＡq7aGlEINSA
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氟化物還有各種不同的機制預防蛀牙，這裡只列出其中的一項。570Please respect copyright.ＰＥＮＡＮＡC1qnjwUC3v
570Please respect copyright.ＰＥＮＡＮＡVkSD2XVbAU
（圖3）只不過，氟化物牙膏並不是萬能的，原因可從圖中得知。570Please respect copyright.ＰＥＮＡＮＡ1NpPnEyjNp
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。570Please respect copyright.ＰＥＮＡＮＡ5FikTnONdH
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc570Please respect copyright.ＰＥＮＡＮＡafacvBm8Yr
570Please respect copyright.ＰＥＮＡＮＡr9cx2n7oof
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。570Please respect copyright.ＰＥＮＡＮＡLABmFqi28Z
570Please respect copyright.ＰＥＮＡＮＡBcS6umaGsr
Link:570Please respect copyright.ＰＥＮＡＮＡODdyU2L25o
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio570Please respect copyright.ＰＥＮＡＮＡNrGu5Kv7BF
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。570Please respect copyright.ＰＥＮＡＮＡel91M7vJDM
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
薯仔聞茱莉
ISSUE #69
深入淺出–牙膏內為何會添加氟化物？
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